found a treasure.Limestone, magnetite, rock salt, borax, gypsum… These minerals are rich in borates, nitrates, carbonates, and calcium carbonate.They represent lime, cement, glass, and even... explos...It is now the middle of the month.

The night was deep, a round moon hung high in the sky.

Inside the Yang family home, everyone sat together, watching Xiao Jiu calculate.aking, iron smelting, cement production, papermaking, and watermill construction."Then, what else can we develop in the city" Li Yuy Yao continued to ask."There are a lot of them, like shops, stores,...